I'm looking to plot historic market cap, say over the past decade, of 5 companies - Google Facebook Amazon Walmart and Exxon Mobil. Googled to find any site which let's me add multiple ticker symbols but couldn't find any. Any one know how to do this ?
Just download publicly available data for the companies over the past 5 years. Multiple share price on each day by number of share outstanding. Done.
I guess this is what I need to do if I don't find an easier way
http://m.wolframalpha.com/input/?i=GOOGLE+VS+AMZN+VS+FB+vs+XOM
Yahoo finance on desktop can do this for 5 year history
Can't locate the app for Mac? Is it only available for windows ?